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' G, G. F. BOSWELL SHOCK ABSORBER.

APPLICATION FILED SEPT. 3. 1919 Reissued May 31, 1921.

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.ZZLAKM A TTORNEY- B of the main spring and is adjusts installed as none of the sor er and associated parts.

UNITED STATES PATENT OFFICE.

GEORGE G. F. BOSWELL, OF INDIANAPOLIS, INDIANA.

SHOCK-ABSORBER.

Original No. 1,242,316, dated October 9, 1917, Serial No. 135,782 filed December 8, 1916. Application for reissue filed September 3, 1919.

To all whom it may concern:

Be it known that I, GEORGE Gr. F. Bos- WELL, a citizen of the United States, residin at Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Shock-Absorber; and I do hereby declare that the following is a full, clear, and exact description thereof, reference bein had to the accompanying drawings, in w ich like letters refer to like parts. I

This invention relates to shock absorbers which are especially adapted to be used on Ford automobiles or automobiles having springs of similar construction.

The main feature of the invention lies in the peculiar construction of the shock absorbing spring and its associated parts so that none of the elasticity of the main spring will be lost and it will not be necessary to use clamps thereon which will deprive it, to some degree, of its function as a spring and take the life from it. In this res ect the end motion of the spring is uti ized.

Still another feature of the invention is the simplicity of the construction which will ermit it to be cheaply made and quickly arts of the original spring construction is clianged.

The full nature of the invention will be understoodifrom the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is a front elevation of the front axle of an automobile with the sprin and shock absorber thereon. Fi 2 is a si e elevation of the shock ab- Fig. 3 is a plan view looking down on the shock absorber, as shown in Fig. 2.

In the drawings there is shown the front axle 10 of an automobile, a wheel 11, a frame 12 and a main spring 13 secured to said frame by the U-bolts 14:. Rigidly secured at each end of said axle there are projecting members or supports 15 to which is pivoted at 16 a pair of vertical bars 17 1V- oted at the u per ends of said pivot bars there is an -shaped spring supporting shackle 18 which is pivoted at its lower en to the end bearin s 19 of the main spring. Said supportin s ackle is provided with a heel bar 20 whic lies adjacent the upper side dt ereto by Serial No. 321,463.

a set screw 21 for adjusting the tension of the shock absorber. A looped spring made of sprlng steel 22 is secured to the supportin shackle at 23 and loops around over the en thereof and is secured at its other end to the supporting pivot bars 17 and arranged so as to tend to increase the angle between parts 17 and 18. Said spring 22 is adapted to act as the resilient and yielding member of the shock absorber so that minor shocks, which the main spring would not absorb, due to its heavy construction, would be taken up by the looped spring and absorbed thereby, permitting the main spring to take the extreme low position shown by dotted lines in Fig. 2, or the position shown in Fig. 1, between which positions it will be free to oscillate.

With this construction, the shackle 18 may be pivoted at a point higher than the support 15, and thereby ive the main spring 13 and the lower part 0 the shackle 18 ample room for o eration and lateral movement under the in uence of the load, although the support 15 is curved and extends in wardly, as shown. The set screw 21 adjusts the position of the shackle 18 with reference to the main spring and causes corresponding change of position of the upper part of the pivot bar 17 and change of tension of the spring 22. In other words, with this construction, the positions of the shackle 18, the upper part of the link bars 17 and the tension of the spring 22 is rigidly adjustable.

The invention claimed is:

1. The combination With the axle and a semi-elliptical spring of a vehicle, of a shock absorber includlng a substantially vertical pivot bar carried by the axle and pivoted at its lower end, a spring supporting shackle pivotally connected at its lower-end with the end of the vehicle spring and at its upper end with the upper end of the pivot bar so as to have a swinging movement on said pivot bar as the spring lengthens under the influence of a load, an a spring connected with said pivot bar and shackle which tends to force the shackle away from the pivot bar.

2. The c'ombinatiomwith the axle of a vehicle, a post extending upwardly therefrom, and asemi-elliptical spring .for' supporting the body of the vehicle, of a' shock absorber meanin a substantially vertical 110 pivot bar pivoted at its lower end to said post, a spring suporting shackle pivotally connected at its upper end :with the end of the pivot bar so as to have a swinging movement on said pivot bar as the spring lengthens under the influence of a load, and a spring connected with said pivot bar and spring supporting shackle which tends to resist the swinging movement of said member under the influence of the load.

The combination with the axle and a semi-elliptical spring of a vehicle, of a shock absorber including a substantially vertical pivot bar carried by the axle and pivoted at its lower end, a spring supporting shackle pivotally connected at its lower end with the end of the vehicle spring and at its upper end with the upper end of the pivot bar so as to have a swinging movement on said pivot bar as the spring lengthens under the influence of a load, and a looped spring with one end of the loop, pivoted to said bar and the other end to saidshaclrle which tends to resist the swinging movement of said member under the influence of the load.

4. The combinationwith the axle and a semi-elliptical spring of a vehicle, of a shock absorber including a substantially vertical pivot bar carried by the axle and pivoted at its lower end, a substantially L- shaped spring supporting shackle with the upper end thereof pivoted to the upper end of the vehicle spring and at the heel thereof bearing on the upper side of the vehicle spring, and a spring connected with said pivot bar and spring supporting shackle which tends to resist the swinging movement of said member under the influence of the load.

5. The combination with the axle and a semi-elliptical spring of a vehicle, of a shock absorber including a substantially vertical pivot bar carried by the axle and pivoted at its lower end, a shackle pivotally connected at its lower end to the end of the vehicle spring and normally extending upward perpendicularly from said spring and with its upper end pivoted to the upper end of the pivot bar, and a spring connected with said pivot bar and spring supporting shackle which tends to resist the swinging movement of said member under the influence of the load.

6. The combination with the axle and a semiselliptical spring of a vehicle, of a shock absorber including a substantially ver tical pivot bar carried by the axle and pivoted at its lower end, a substantially L shaped spring supporting shackle with the upper end thereof pivoted to the upper end of the vehicle spring and at the heel thereof bearing on the upper side of the vehicle spring, a spring connected with said pivot bar and spring supporting shackle which tends to resist the swinging movement of said member under the influence of the load, and means in the heel of said shacklefor adjusting the position of the heel with relation to the vehicle spring.

7. The combination with the axle of a vehicle,a semi-elliptical main spring therefor, and rigid upwardly extending supporting member secured near each end of the axle, of a vertical member adapted to 'support the end of the main spring, pivot bars pivoted to the upper end of each supporting member and extending upward therefrom and pivoted at the upper ends to one end of said spring supporting member, and yielding means tending to resist the movement of said spring-supporting member toward said pivot bars under the influence of a load on said main spring, whereby said main spring and spring-supporting member will have ample room for lateral movement under, the influence of the load. 7

8. The combination with the axle of a vehicle, a semi-elliptical main spring therefor, and a rigid upwardly, and inwardly curved supporting member secured near each end of the axle, of a vertical member adapted to support the end of the main spring, pivot bars pivoted to the upper end of each supporting member and extending upward therefrom and pivoted at the upper ends to one end of said spring-supporting member, and yielding means tending to resist the movement of said spring-supporting member toward said pivot bars under the influence of a load on said main spring, whereby said main spring and springsupporting member will have. ample room for lateral movement under the influence of the position of the main spring-supporting means with reference to the main spring and said pivot bars with. reference to their rigid supporting means.

In witness whereof, I have hereunto affixed my signature, at Indianapolis, Indiana.

GEORGE e. r. BoswEL 

